Air from Goldsboro Nc writes
I have a large backyard and I cannot get to most of it with water via sprinkler and/or sprayer. I have an issue with fire ants (can’t walk barefoot in the yard) & grubs along with some really awful-looking spiders. Would it still be effective with no watering? I have pets - will leaving it unwatered affect the dogs?
Bifen L/P Insecticide Granules require water by irrigation or rainfall in order to release the active ingredient. Without watering the granules, the application will be ineffective in eliminating insects targeted on the product label. If irrigation is difficult in some areas of the lawn, you would need to apply the before at least 1/2 inch rainfall is expected or by doing individual mound drench applications to directly treat the fire ants.
For mound drench applications, apply 1/2 cup of Bifen Granules to each mound then drench each mound with 1-2 gallons of water using a bucket (not a watering can) to deliver enough force to break open the top of the mound and allow the solution to flow into and throughout the fire ant tunnels. Treat a 4ft diameter around each mound.
Also, Bifen L/P Granules are not listed to control grubs or spiders. You could consider using the liquid concentrate Bifen IT to treat fire ants, spiders, Japanese beetles(adults), and many other insects around the exterior foundation of the home including the lawn, bushes, trees, shrubs, and landscape beds. Bifen IT is mixed with 0.5 to 1 fl oz per gallon of water and applied using a handpump or backpack sprayer. View the product label for more information.
For Grubs, please view our Grub Treatment Guide for product and treatment recommendations.
Answer last updated on: 02/24/2025
